US 2008/0175144 A1 · Method, apparatus and system for establishing return label switch path in multi-protocol label switching system

Abstract

A method, an apparatus and a system for establishing a return LSP in an MPLS system are disclosed. The method includes: recording a path of a protection LSP; constructing an explicit routing object along the reverse of the path of the protection LSP; establishing the return LSP according to the explicit routing object. It is possible to effectively avoid that a return LSP overlaps with a working LSP in accordance with the embodiments of the present invention, thereby ensuring the transmission of LSP failure information via the return LSP in the case that the working LSP fails or transmission quality is impaired, and ensuring the normal operation of protection switching.

Claims15

Dependent claims

A method for establishing a return Label Switch Path (LSP) in a Multi-Protocol Label Switching (MPLS) system, comprising:

recording, by a last node in a procedure of establishing a protection LSP, a path of the protection LSP upon establishing the protection LSP;
constructing, by the last node, a first explicit routing object along the reverse of the path of the protection LSP;
establishing, by each node on the protection LSP, a return LSP according to the first explicit routing object.

Dependencies are inferred from the claim text.

Method, apparatus and system for establishing return label switch path in multi-protocol label switching system

Life of this patent

Method, apparatus and system for establishing return label switch path in multi-protocol label switching system

Life of this patent

Abstract

Claims15